National Instruments NI 781xR - Manual (Page 30)

Appendix A Specifications
© National Instruments Corporation A-3 NI 781xR User Manual
Power Requirement
+5 VDC (±5%)
NI 7811R......................................... 9 mA (typ), 50 mA (max) 1
NI 7813R......................................... 9 mA (typ), 50 mA (max) 1
+3.3 VDC (±5%)
NI 7811R......................................... 650 mA (typ), 1,000 mA (max) 2
NI 7813R......................................... 850 mA (typ), 1,350 mA (max) 2
To calculate the total current sourced by the digital outputs, use the
following equation:
where j is the number of digital outputs being used to source current.
Power available at I/O connectors ......... +4.50 to +5.25 VDC,
250 mA per I/O connector pin
Physical
Dimensions (not including connectors)
NI PXI-781xR ................................ 16.0 cm
× 10.0 cm
(6.3 in.
× 3.9 in.)
NI PCI-781xR ................................ 15.5 cm
× 10.6 cm
(6.105 in.
× 4.162 in.)
Weight
PCI-781xR ...................................... 112 g
PXI-781xR ...................................... 162 g
I/O connectors ........................................ Four 68-pin female high-density
VHDCI type
1 Does not include current drawn form the +5 V line on the I/O connectors.
2 Does not include current sourced by the digital outputs.
current sourced on channel i
i 1 =
j
∑